webcam, mic streaming over rtp, quality problems (especially audio)

[pumba]

HI, here's my pipeline, which produces bad result. Please help me to improve this pipeline.

gst-launch-1.0 -v v4l2src ! video/x-raw,width=640,height=480 ! x264enc tune=zerolatency ! h264parse ! queue ! mpegtsmux name=mux ! tsparse ! rtpmp2tpay ! udpsink host=127.0.0.1 port=5000 pulsesrc ! audio/x-raw,channels=2,format=S16LE,rate=44100 ! audioconvert ! audio/x-raw,channels=2,format=S16LE,rate=44100 ! voaacenc ! audio/mpeg,stream-format=adts,channels=2,rate=44100 ! mux.